Yep, NOAA, the giant federal agency better known for tracking weather, climate change and marine interests, says it has found a historic map that President Abraham Lincoln used to develop a war strategy against the South.

The map was drawn by the U.S. Coast Survey, NOAA’s predecessor agency, in 1861. Now it’s included in NOAA’s new special collection of Civil War maps and charts, “Charting a More Perfect Union.”

That collection, containing more than 400 documents, is intended to mark the 150th anniversary of the Civil War.